Despite the fact that Lutheran theology is molded by the medieval theological context, argues Mark Thomsen in this article, its central reality of a theology of the cross offers a surprising "potential for constructing a dynamic foundation for a contemporary vison of the Missio Dei." What this theology of the cross is not is neither "a glorification of suffering and death," a simple repetition of the Anselmian doctrine of atonement, nor is it a doctrine of the atonement at all. Rather, a Lutheran theology of the cross is one with mission at the center. It means dying to oneself for the sake of the vision of the Reign of God. It means being in solidarity with the suffering peoples of the world. It means recognizing the almost overwhelming power of evil, and God's struggle in Christ with that power. Finally, a theology of the cross points to God's vulnerability in the world. Christians participate in God's mission by themselves taking up the cross, recognizing God's gracious commitment to offering abundant life to the entire creation.